Pull-socket.



H. HUBBELL.

PULL SOCKET.

.APPLIOATION FILED JUNE 17, 1911.

Patented Feb. 18 1913.

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APPLIGATIQN FILED 11111317, 1911.

Patented Feb. 18, 1913.

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` A TTOH/VEY lets and that the 1break is a HARVEY HUBBELL 0F'BRIDGEPORT, CONNECTICUT.

PULL-SOCKET.

Application :filed J'une 17, 1911. Serial No. 633,850.

To all whom lt may concern: v

Be it known that I, HARVEY HUBBELL, 'a citizen of the United States,rresiding at Bridgeport, county of- Fairfield, State` ofE Connecticut,have invented an Improvement in Pull-Sockets, of which the `following.is a specification.

This invention has for its object vto gen-Vl erally improve theconstruction and Inode of operation of pull sockets and especially toprovide a pull socket which may be operated by a chain or cord attachedto a lever not on the shaft of the switch and wholly insulated from theswitch mechanism, my novel mechanism accomplishingthe desired result-with a relatively short movement ofthe lever and requiring -but arelatively sho-rt slot in the socket,'the lever moreover being pivoted'centrally thus avoiding a side pull upon the socket in a direction atright angles to the path of movement of the lever.-

An important advantage of t-he presentstructure is that I avoid the useof a guide through which the' chain must pass and the attachment of thechain to a moving part within the-shell. It is of course well understoodthat the breakingof the chain is the accident most likely to ha pen topull sockost certain tobe within the shell, thus putting the lamp out ofcommission and requiring the services of an (electriciany to repair it.

In the accompanying drawings forming a part'ol this specification, inwhich similar reference characters indicate the same parts in allvtheviews, Figure 1 is an elevation of my novel socket, the shell bein shownin sec-tion; F ig; 2 is -a' plan View o the operative parts,` looking upas seen in Fig. 1, the lower insulating block andthe binding posts beigremoved; Fig '3 anI eleva-j tion, partly broken away, from a point offview opposite to'that in Fig. 1; Fig. 4 a section on the line 4--4 inFig. l looking in the direction of the arrows; Fig. 5 a plan ,view'ofthe lower insulating blocks as seen in Figs. 1 to 4 inclusive, showingthe springy contact plate; Fig. 6 an elevation of the insulating gearwheel detached; Figs, k7, 8,- and 9 reverse elevations and an edge-viewof the operating disk detached; Fi 10 an elevation of thefixedninsulating p ate detached; Fig. 11 a view similar to Fig. 1

showing a modified construction; Fig. 12 is a bottom plan view oftheupper insulating blockas shown in Fig. 11 and the operative opposite tothat. in Fig. 11.

parts carried thereby, one of the binding posts being removed. Fig. 13is a sectional `view on the line 13-13 of Fig.l 14, this view-showingthe parts from a point of view Fig. 14 is a Specification of LettersPatent. Patented-Feb. 18, 1913.

section on the line 14-14 in Fig. 13, looking in the direction vof'thearrows. Fig. 15 is a lplan view of the upper face of the lowerinsulating'block as seen in Figs. 11 and 14,

showing the spring contact plate. Figs. 16,

and v17 are respectively an edge vview and a. side elevation of .theinsulating operating device or 4gear member detached. v

20 denotes the screw shell,\21 and 22 insulating blocks to one of whichV(block 21) l the vscrew shell is-attached, {S3-the socket shell, 23 and24 binding posts, and 25 and '26 binding screws in the respectivebinding posts. y

27 denotes a. base plate which is secured to insulating block 21 by ascrew 28 which also secures a contact spring29 to said insulating block,said contact'spring being adapted to be engagedv by the center contactof a lamp (not shown). Binding postl 23 is secured to insulating block22 by'a. screw 34 and to insulating'block 21 -by a screw 35 which alsosecures the screw shell to said block. Binding post 24 is secured toinsulating block 21 Iby a screw 36 (seel dotted lines Fig. 1) and toinsulating block 22 by a screw 62 which also securesa spring plate 49 tosaid block.

30 denotes a transverse shaft, one end of which is journaled in an arm31 extending from the base plate, the other end Abeing `journaledin anangular head 37 which is itself mounted between an arm 32'also extendingfrom lthe base plate and a boss or projection 33 on insulating block 22.The angular head normally lengages an an lai` recess 38 in boss 33 whichlocks said an annularrecess 39 in the boss,ffor a purcad ragainstrotation, said head being adapted when pushed .forward slightly torotate in pose presently to be-explained. An' louter A recess 40 isprovided in said boss to permit' .the insertion ofvavl screw driver .toengage, This construction will a Slot in head"37. be readily understoodfrom Fig.- 5 which see in connection with Fig. 4.

41 denotes a. fixed insulating platethrough which ,the shaft passes',rotating freely therein, and which is secured in any suitable manner asto arms 4 2 which extend from the base plate. The insulating plate,which maybe made of fiber or any suitable insulating material, isprovided at its ends with studs 43 and 44, to either of which theoperatling lever 45 may be pivoted, as will be. more fully explained.

' 46 denotes a cam loosely mounted on shaft which is constantlyengagedby a spring 47 attached tothe base plate' as at 48 and is adapted in'the lcircuit' closing position to engage a spring plate 49 which isconnected to binding post 24,' (see Figs. 4 and 5.)` Cam 46 isprovidedon its inner sidewith a recess 50 (see Fig. 4) which is looselyengaged byl lu'gs 51 which project. from the' shaft and cause the-cam torotate with the shaft. It will be noted thatl spring 47 is curved and`re-curved so as to give it great resiliency, the action' of thisspring, in connection with lugs 51 and the recess inthe cam, being tocause the cam to move forward to open vand close the circuit with a snapwhen it passes the center of en agement with spring plate 49. The shaft1s operated to open and closethe circuit by means of a seg# either afull gear wheel or a segment.

ment gear 52 on the operating lever which engagesV an insulatinggearwheel 53 loosely mounted on the hub 54 of the disk 55 which isrigidly secured'to the shaft, as by a drive lfit. Gearwheel 53 may. bemade of any suit` able insulating material, as fiber, and may be It willbe noted that the radius of the pitch ...line of segment gear 52 isgreater than the radius of the pitch line of insulating gear wheel 53. Ithus produce adlnerential acd tion between the segment gear and theinsuf insulating plate 41 is provided with -a cor--P` responding numberof angular recesses 57.

lating gear wheell which gives the required amount of rotation of theinsulating gear wheel with a relatively short movement yof theopera-ting lever. I'nsulating gear wheel 53 in this form is providedwithlangular` recesses 56, four in the present instance, and

Disk I55 which is rigidly ,secured totheshaft is provided upon one sidewith lugs 58, two 1n the present instance, adaptedto engage 4 therecesses in the insulating plate and-upon theopposite side with acorresponding number oflugs 59 adapted to engage the recesses in theinsulatmg gear wheel. These lugs haveangular engaging faces and'inclinedbacks so as to cause orlpermit movement in one direction only.

\ gear wheel, 'the attachment bei vdenotes a coil sprmg'surrounding theshaft, one end` of which isconnected to angular he'ad37 and the other totheinsulating the present instance by bending-'tie ends of.t

the spring parallel-with the axis thereof and insertin them in holes inthe angular head and in t e insulating" ear` wheel', the hole in 3 thegear wheelbeing indicated by 61. (See Fig. e.)

v. The operation is asf'ollowsziWhen the lemade in.

ver is operated it will cause the insulating gear'wheel to carryA disk55 and the shaft forward through the engagement of the walls of recesses56 in the insulating gear. .wheel with lugs 59 on thedisk which is riidly secured to the shaft. I"When the disk 1s driven forward by theinsulating gear wheel, lugs 58 uponthe disk will ride out of recesses 57in the insulating plate and will bear upon the solid portion of theplate between two ofthe recesses, spring 60 yielding and permitting theshaft and disk to move :slightly longitudinally. This movement of theinsulating .gear wheel both winds the 'spring and compresses itlongitudinally. The instant spring 47 snaps the cam to the circuitopenin or closing position s ing 60 by its-'longitu inal expansion willorce the insulating gear wheel and shaft forward and causeA lugs .58 inthe disk to engage recesses 57 in the'insulating plate which will lockthe disk andshaft against backward moveturn the insulating gear wheeland the lever to their normal positions, the recesses- 56 with whichlugs 59 on the disk have been in engagement passing backward away fromthe lugs (the spring compressing longitudinally) whichsnap into theother pair of recesses 56 at the end of the backward movement ready tocarry the disk andshaft -forwardl again at the r'next operation of thein- `sulating gear 'wheel `b v means `of the lever.

Should it be required at any time to increase the tension of spring 60theoperatonmay m- '.sert a screw 'driver in the Slot in h ead 37, pushsaid head forward. slightly against the power of the vspring* out ofangular recess 38 and into annular;l recess '39 and then wind the springas much as may be necessary to secure prompt return of the lever to itsnormal position when the pull is removed, and

then allowthe spring to force the head backward into engagement withyangular recess 38. l Y

In Fig. 1, the socket is shown in position to receive a lamp in theupright osition. Shouldit be required to use the soc et with a dependinglamp the lever -would be removed from stud 43 and placed upon stud 44.

In the form of the invention shown in Figs 11 to 17 the principle ofoperation is precisely the same as in the other form, the

differencebeing 4in details of construction and arrangement. Referringto said figures, 20`denotes the screw shell, 63 the socket shell, 21 and22 insulating blocks, to one of which (the ,block 21) the screw shell isattached by means-of screws 64 which also secure to 'said shell-fandtosaid block 21 a yoke or bridge piece 65 formed integral with a'bindingpost 66 attachedrat itsopposite end to the block 22 by means of a screwpassing through an opening 67 (see Fig. 12) in said 'n ment. When thepull upon the `lever is relieved the unwinding of sprmg 60 will reatlblock, lSaid bindingpost being provided with a binding screw 68. 69denotes the base plate which is secured to the block 22 by a screw 70said base plate being formed with i,

an integral binding post 71 carrying a binding screw 72. 73 denotesal'spring plate secured to t-he base plate 69 as by a'rivet 74 69 andattached. to the' insulating block 2 1,

by means of a screw or`bolt 79 A(see Fig. 1'3') entering an 'opening 80`(see Fig. 15) in said block I21. The arms 78 together l.with the4binding post .6.6 constitute means for conneet-ing and spacing theinsulating blocks 21 and 22. The binding post 66 to which one of theline wires is attached is, as will beseen, directly connected by meansof its yoke piece 65 to the screw shell 20. The other loinding post 71to which the other line wire is attached connects through the lbaseplate 69 and 'spring plate 73, thence through the circuit closer withthe spring plate 75, screw 76 and center contact 77.

The switch or circuit closing mechanism in the present form of theinvention is substantially identical with that in. the form of theinvention 'first described and need not be referred to in detail exceptto note the following diiferences. In the present case the angular head37 is mounted in an angular recess formed by two bosses 81 and 82 oninsulating blocks 21 and 22 respectively. (See Fig. 14.) The insulatingplate41 is secured to the arm '78 on the base plate, which is attachedto the insulating block 21, and to a second arm 83 extending from saidbase plate. Also in the present instance the insulating gear 85, whichcorresponds in function tothe lgear 53 in the form of the invention lastdescribed, is formed with two separate segments 84 ad-apted respectivelyto beengaged by the segment gear 52 on the operatinr lever, accordipg assaid lever is pivoted upon stud 43 or. stud 44 of insulating plate/11.vIn place'of the angular recesses 56 with which the gear. 53 in the formof the invention last described is provided, the insulating gear 85 isformed on its face adjacent the disk 55 withinclined recesses or grooves86 which are engaged by`the lugs 59 on the disk 55 in the same manner asthe recesses 56. Itis thought that the operation of this form of theinvention will be clearfrom the foregoing description of the operationof the form first described without further explanation. l

Having thus described my invention I claim:

1. A pull socket comprising switch mechanism including 'ashaft, a disksecured to the sha-ft and provided with a hub, a spring controlled gearmounted to rotate on the' hub, intermediate operating connectionswhereby the disk and shaft are rotated and a segmental gear engaging thespring controlled gear.

2. 'A pull socket comprising an insulating plate, a shaft passingthrough the plate, a

disk secured to the shaft and provided with a hub and with meansengaging the plate to prevent. backward movement,IA a spring controlledgear mounted on thehub, connections intermediate' the gear and the disk,and

a segmental gear engaging the spring con-- trolled gear.

8. A pull socket comprising a` switch member, an operating lever, pivotsfor operatively connecting said'lever and member, and means. wherebysaid lever may be supported in operative relationship to said mem-y berin a thereto. x l

.4. A pull socket comprising switch mechanism including a shaft, anoperating lever, aplate provided with 4means whereby said lever may befulcrumed thereon in a plurality of positions,

plurality of positions with respect 9o i and means for operativelyconnecting said lever and shaft'in any position' of said lever on saidplate.

5. In a pull socket, switch mechanism comprising a shaft, means on saidshaft through which it may be rotated in one dir rection, a gear looseon said shaft, said gear and rotating means being relatively movablelongitudinally of said shaft into and out of operative engagement, aspring for normally holding said parts in engagement, and anoperating'lever having a segmental gear to engage and turn said firstnamed gear.

-6. InV a pull socket, switch mechanism comprising a plate, a shaftpassing through said plate, -a disk mounted on said shaft for rotationtherewith, an operating' device loosely mounted on said shaft, saidplate and disk having a setof interengaging recesses and projections andsaid operating device and disk having a second set of interengaging`recesses and projections, a spring for normally holding both of saidsets of recesses and projections in engagement, a lever fulcrumed onsaid plate at one side of said shaft, and means for operativelyconnecting said lever and operatlng device.

7. A pull socket comprising a pair of insulating blocks, a binding, postextending between and secured to said blocks, a base plate secured toone of said blocks, a sprin plate carriedl by said base plate, a secon sring plate carried by the other of said b ocks, a shaft supported bysaid base plate and provided with means for closing the circuit betweensaid spring plates, an insulating plate carried by said base plate, alever fulcrumed on said insulating plate, and means for operativelyconnecting said'lever and shaft.

8. A pull socket comprising abase plate, switch mechanism connected withsaid base plate andl including a shaft, a lever operatively connectedWith said shaft for rotating the same, and a ulcrum for said levercarried by said base plate.

9. A pull socket comprising switch mechanism including a shaft', aninsulating gear on said shaft for rotating the same, an insulatingp1ate, and an operating-lever fulcrnmed on sald plate and engaging saidlgear. v

l0. `A pull socket comprising a pair of insulating blocks; a. pair 0fbinding posts connecting and spacingsaid blocks, a base plate secured toone of said blocks and having a pair of arms, switch mechanism includinga shaft'supported by said arms, a lever for 0perating said shaft,` and afulcrum for said lever carried by said base plate.

In testimon whereof I affix my signature in presence o two witnesses.

. HARVEY HUBBELI...

Witnesses:

' ARTHUR W.CALVER, S. W. ATHERTON.

